Hidden Palace Zone (Sonic & Knuckles)

Hidden Palace Zone as Sonic during the fight with Knuckles.

Hidden Palace Zone is the fifth zone in Sonic & Knuckles (the 11th zone in Sonic 3 & Knuckles).

Hidden Palace Zone is where Knuckles hides and protects the Master Emerald.

After a short walk through the level, Sonic will fight Knuckles (unless you are playing as Knuckles, in which case the zone is rendered useless). After this fight, a cutscene occurs in which Dr. Robotnik steals the Master Emerald. Knuckles attempts to save it, but Robotnik electrocutes him. After this, Knuckles will lead you to a teleporter that sends you to the next zone, Sky Sanctuary Zone.